When your physique has been built only with drugs once you come off you have to give that "rented" muscle back!!!!
Yup, the kid in the video says "he lost tissue". No he didn't. (Like some people commented).
He lost temp water and glycogen bloat. No one "loses tissue" on a cleanout, especially if still training hard, takes many years to grow tissue (and lose it).(Not fat, lean muscle tissue).
Stuff shrinks, deflates, drains of fluids, tissue doesn't dissolve...